GLSA 200605-05: rsync: Potential integer overflow

http://security.gentoo.org/

Severity:	high
Title:	rsync: Potential integer overflow
Date:	05/06/2006
Bugs:	#131631
ID:	200605-05

Synopsis

An attacker having write access to an rsync module might be able to execute arbitrary code on an rsync server.

Background

rsync is a server and client utility that provides fast incremental file transfers. It is used to efficiently synchronize files between hosts and is used by emerge to fetch Gentoo's Portage tree.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/rsync	< 2.6.8	>= 2.6.8	All supported architectures

Description

An integer overflow was found in the receive_xattr function from the extended attributes patch (xattr.c) for rsync. The vulnerable function is only present when the "acl" USE flag is set.

Impact

A remote attacker with write access to an rsync module could craft malicious extended attributes which would trigger the integer overflow, potentially resulting in the execution of arbitrary code with the rights of the rsync daemon.

Workaround

Do not provide write access to an rsync module to untrusted parties.

Resolution

All rsync users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/rsync-2.6.8"

References

CVE-2006-2083

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200605-05.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.